Hello Pablo --
Go to this URL:
http://www. exploratorium.edu/snacks
This will take you to an alphabetical list of Science Snacks (science
activities). Open the Charge and Carry snack, and look at the last paragraph
in the What's Going On? section. This is an explanation of the process you
are asking about.
The only thing that I might add, based on your questions, is that the charge
doesn't really go THROUGH the Leyden jar. It goes from the foil, through YOU,
to the nail (or ball).
Hope this helps.
Don Rathjen
Exploratorium Teacher Institute
donr@exploratorium.edu
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